Badain Jaran Desert covers an area of 50.000 sq. kilometers, spanding over the south-central part of of Inner Mongolia Autonomous Region (Nei Mongol) and the north of Gansu. Being the third biggest desert in China, it¡¯s located in the Alxa Plateau, about 1200 meters above the sea level.Both the Badain Jaran Desert and the Tengger Desert (located to the east and merging with Badain Jaran due to desertification of the zone) belong to the Gobi Desert, the 3rd biggest desert in the world (5th considering Antarctic and Arctic as deserts). Badain Jaran is bounded to the north by the Gobi Desert itself, characterized in this area by blackened gravel; to the east by Mount Lang, which separates the Badain Jaran Desert from the Ulan Buh Desert; to the southeast by Mount Yabraishan, which separates the Badain Jaran Desert from the Tengger Desert; to the southwest by the He Xi Corridor; and to the west by the Ruo Shui River or Ejina River in Chinese, which separates the sandy Badain Jaran Desert from the rocky Taklamakan Desert.